Monthly outlook for Jamul, CA: average high 88.6°, average low 71.6°. That is 4.4° above the climate normal for August. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 18 August (93.3°), the coolest 8 August (67.5°).
88.6°/71.6°
Average high / low
+4.4°
Above normal
1 / 0
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
88.9°
80.9°
+4.4°
18 August – 27 August
88.3°
81.2°
+3.9°
28 August – 6 September
at normal
82.6°
—
August records over 66 years
97.3°31 August 2017All-time high
56.5°22 August 1968All-time low
Climate normals and records are computed from the nearest reference point — La Presa (8 mi).
Sun, 0987° / 68°0.07
87 °
Jamul, Sunday, 9 August
Light rain. High 87°, low 68°.
Pressure29.83 inHg
Wind9.3 mph W
Humidity32%
Visibility6.2 mi
Dew point58°
Mon, 1089° / 68°0
89 °
Jamul, Monday, 10 August
Clear. High 89°, low 68°.
Pressure29.91 inHg
Wind8.8 mph W
Humidity37%
Visibility6.2 mi
Dew point59°
Tue, 1190° / 73°0.01
90 °
Jamul, Tuesday, 11 August
Light rain. High 90°, low 73°.
Pressure29.94 inHg
Wind7.8 mph W
Humidity34%
Visibility6.2 mi
Dew point55°
Wed, 1288° / 73°0
88 °
Jamul, Wednesday, 12 August
Overcast. High 88°, low 73°.
Pressure29.91 inHg
Wind10.5 mph W
Humidity41%
Visibility—
Dew point55°
Thu, 1387° / 71°0
87 °
Jamul, Thursday, 13 August
Partly cloudy. High 87°, low 71°.
Pressure29.91 inHg
Wind10.6 mph W
Humidity44%
Visibility—
Dew point55°
Fri, 1486° / 70°0
86 °
Jamul, Friday, 14 August
Overcast. High 86°, low 70°.
Pressure29.94 inHg
Wind9.4 mph W
Humidity39%
Visibility—
Dew point53°
Sat, 1590° / 71°0
90 °
Jamul, Saturday, 15 August
Mostly clear. High 90°, low 71°.
Pressure29.97 inHg
Wind9.2 mph W
Humidity35%
Visibility—
Dew point53°
Sun, 1690° / 73°0
90 °
Jamul, Sunday, 16 August
Overcast. High 90°, low 73°.
Pressure30.00 inHg
Wind9.8 mph W
Humidity36%
Visibility—
Dew point54°
Mon, 1792° / 73°0
92 °
Jamul, Monday, 17 August
Clear. High 92°, low 73°.
Pressure30.00 inHg
Wind10.6 mph W
Humidity28%
Visibility—
Dew point49°
Tue, 1893° / 75°0
93 °
Jamul, Tuesday, 18 August
Clear. High 93°, low 75°.
Pressure29.94 inHg
Wind8.3 mph W
Humidity28%
Visibility—
Dew point50°
Wed, 1992° / 75°0
92 °
Jamul, Wednesday, 19 August
Partly cloudy. High 92°, low 75°.
Pressure29.91 inHg
Wind9.1 mph W
Humidity33%
Visibility—
Dew point53°
Thu, 2088° / 73°0
88 °
Jamul, Thursday, 20 August
Overcast. High 88°, low 73°.
Pressure29.88 inHg
Wind9.1 mph W
Humidity41%
Visibility—
Dew point57°
Fri, 2187° / 72°0
87 °
Jamul, Friday, 21 August
Overcast. High 87°, low 72°.
Pressure29.88 inHg
Wind8.1 mph W
Humidity45%
Visibility—
Dew point58°
Sat, 2284° / 71°0.01
84 °
Jamul, Saturday, 22 August
Light rain. High 84°, low 71°.
Pressure29.88 inHg
Wind8.5 mph W
Humidity51%
Visibility—
Dew point60°
Sun, 2386° / 70°0
86 °
Jamul, Sunday, 23 August
Mostly clear. High 86°, low 70°.
Pressure29.88 inHg
Wind10.6 mph W
Humidity52%
Visibility—
Dew point60°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 65°0
82 °
Jamul, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0 in
Chance of precipitation3%
Record high90° (1985)
Record low59° (1978)
Tue, 2582° / 66°0.01
82 °
Jamul, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.01 in
Chance of precipitation7%
Record high94° (1985)
Record low58° (2024)
Wed, 2682° / 66°0
82 °
Jamul, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high93° (2021)
Record low58° (1987)
Thu, 2783° / 66°0
83 °
Jamul, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high95° (2009)
Record low58° (1989)
Fri, 2883° / 66°0.01
83 °
Jamul, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.01 in
Chance of precipitation2%
Record high95° (2023)
Record low57° (1973)
Sat, 2983° / 67°0
83 °
Jamul, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0 in
Chance of precipitation3%
Record high95° (2023)
Record low58° (2010)
Sun, 3082° / 67°0
82 °
Jamul, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0 in
Chance of precipitation3%
Record high95° (1967)
Record low59° (2010)
Mon, 3182° / 66°0
82 °
Jamul, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0 in
Chance of precipitation0%
Record high97° (2017)
Record low58° (1973)
Tue, 0182° / 65°0
82 °
Jamul, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0 in
Chance of precipitation3%
Record high95° (2017)
Record low58° (1964)
Wed, 0282° / 66°0
82 °
Jamul, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high94° (2017)
Record low59° (1999)
Thu, 0382° / 66°0
82 °
Jamul, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high103° (1988)
Record low58° (1973)
Fri, 0483° / 66°0
83 °
Jamul, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0 in
Chance of precipitation3%
Record high102° (1988)
Record low58° (1999)
Sat, 0583° / 66°0
83 °
Jamul, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0 in
Chance of precipitation2%
Record high103° (2020)
Record low58° (1973)
Sun, 0683° / 66°0
83 °
Jamul, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0 in
Chance of precipitation7%
Record high99° (2020)
Record low58° (1973)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Jamul, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Jamul, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.